memd_creation.pl: glob on *.rvpd to allow README in memd_binaries

Latest blackbird-xml from Raptor has memd_binaries/README which
the glob of * would grab and try and parse.

So, don't try and treat it as a MEMD file.

Resolves #192
Signed-off-by: Stewart Smith <stewart@flamingspork.com>
Change-Id: Idf2f5f8702ac20ef165e8c4831b6f5039cd6e992
Reviewed-on: http://rchgit01.rchland.ibm.com/gerrit1/94783
Tested-by: Jenkins Server <pfd-jenkins+hostboot@us.ibm.com>
Tested-by: Jenkins OP Build CI <op-jenkins+hostboot@us.ibm.com>
Tested-by: Jenkins OP HW <op-hw-jenkins+hostboot@us.ibm.com>
Reviewed-by: Corey V Swenson <cswenson@us.ibm.com>
Tested-by: FSP CI Jenkins <fsp-CI-jenkins+hostboot@us.ibm.com>
Reviewed-by: Daniel M Crowell <dcrowell@us.ibm.com>

src/build/buildpnor/memd_creation.pl

@@ -6,8 +6,9 @@
 #
 # OpenPOWER HostBoot Project
 #
-# Contributors Listed Below - COPYRIGHT 2017,2018
+# Contributors Listed Below - COPYRIGHT 2017,2020
 # [+] International Business Machines Corp.
+# [+] Stewart Smith
 #
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
@@ -66,7 +67,7 @@
 if($memd_dir)
 {
     print "Reading files from $memd_dir\n";
-    @memd_files = glob($memd_dir . '/*');
+    @memd_files = glob($memd_dir . '/*.rvpd');
 }
 elsif(@memd_files)
 {